GB1 instruction guide | 9
Menu
In the functions Menu it is possible to change the radio’s parameters.
Press the Menu button and select the desired function (from F1 to F5)
by using the ▲ or ▼ keys. Confirm by pressing Menu again and select
the desired value with the ▲ or ▼ buttons.
The functions menu is composed of the following 5 options listed here
below:
F1 CTCSS (subaudio tones): you can select the desired CTCSS tone; you
can choose amongst 50 different tones from 67Hz to 254,1Hz. If you
select ‘OF’ the CTCSS tone is disabled.
F2 DSC codes: the codes available are from 1 to A4. If you select ‘OF’
the DCS code is disabled.
F3 SQUELCH LEVEL: it allows to select the squelch threshold level (from
0 to 9. 0 = no squelch threshold). To open the squelch and disable a
threshold previously set, press .
F4 KEYPAD BEEP: whenever a key is pressed the radio will emit a beep
tone. If it’s too loud or too soft for you, it can be adjusted with 9 dif-
ferent levels between b0 and b8. b0 = no beep.
F5 RF POWER: to select the tx power level. Two levels are available: HI
(high) and LO (low). This menu is active only in the export version.
If you hold down the Menu button for 3 seconds, you will enable the
keypad lock; the display shows
and only and keys will be active.
To disable the keypad lock push the Menu button again for 3 seconds.
Monitor
This function allows to temporarily open the squelch so as to listen to
signals that are too weak to be received. Briefly press to open the
squelch. This key also excludes the CTCSS and DCS tones programmed
on that channel.
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